I have noticed that I get a buzzing like soud when I am accelerating. It kicks in at about 22-2400rpm. I kinda sounds like a turbo spooling up. I dont know if it is the copper gasket between the manifold and the secondary or if the whole thing is lose. I tried to tighten up everything but it all seems to be sealed up pretty good. Or is that just the sound it makes? Any suggestions?